Exhibit 99.10
 GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE
                                   FORM W-9

   Guidelines for Determining the Proper Identification Number to Give the
Payer--Social Security Numbers have nine digits separated by two hyphens: i.e.,
000-00-0000. Employer Identification Numbers have nine digits separated by only
one hyphen: i.e., 00-0000000. The table below will help determine the type of
number to give the payer.



- -----------------------------------------------------------------------------------
                                               Give the
                                               SOCIAL SECURITY
For this type of account:                      number of--
- -----------------------------------------------------------------------------------
                                            
 1. An individual's account                    The individual
 2. Two or more individuals (joint             The actual owner of the account
    account)                                   or, if combined funds, any one of
                                               the individuals(1)
 3. Husband and wife (joint                    The actual owner of the account
    account)                                   or, if joint funds, either person(1)
 4. Custodian account of a minor               The minor(2)
    (Uniform Gift to Minors Act)
 5. Adult and minor (joint account)            The adult or, if the minor is the
                                               only contributor, the minor(1)
 6. Account in the name of                     The ward, minor or incompetent
    guardian or committee for a                person(3)
    designated ward, minor, or
    incompetent person
 7. a. The usual revocable savings             The grantor-trustee(1)
       trust account (grantor is also
       trustee)
    b. So-called trust account that is         The actual owner(1)
       not a legal or valid trust under
       State law
 8. Sole proprietorship account                The owner(4)
- -----------------------------------------------------------------------------------



- --------------------------------------------------------------------------------
                                           Give the EMPLOYER
                                           IDENTIFICATION
For this type of account:                  number of--
- --------------------------------------------------------------------------------
                                        
 9. A valid trust, estate or pension       The legal entity (Do not furnish
    trust                                  the identifying number of the
                                           personal representative or trustee
                                           unless the legal entity itself is not
                                           designated in the account title)(5)
10. Corporate account                      The corporation
11. Religious, charitable, or              The organization
    educational organization
    account
12. Partnership account held in the        The partnership
    name of the business
13. Association, club, or other tax-       The organization
    exempt organization
14. A broker or registered nominee         The broker or nominee
15. Account with the Department of         The public entity
    Agriculture in the name of a
    public entity (such as a State or
    local government, school
    district, or prison) that receives
    agricultural program payments
- --------------------------------------------------------------------------------

(1) List first and circle the name of the person whose number you furnish.
(2) Circle the minor's name and furnish the minor's social security number.
(3) Circle the ward's, minor's or incompetent person's name and furnish such
    person's social security number.
(4) You must show your individual name, but you may also enter your business or
    "doing business" name. You may use either your Social Security Number or
    Employer Identification Number.
(5) List first and circle the name of the legal trust, estate, or pension trust.

Note: If no name is circled when there is more than one name, the number will
      be considered to be that of the first name listed.



            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
                                    Page 2

Obtaining a Number
If you don't have a taxpayer identification number or you don't know your
number, obtain Form SS-5, Application for a Social Security Number Card, or
Form SS-4, Application for Employer Identification Number, at the local office
of the Social Security Administration or the Internal Revenue Service and apply
for a number.

Payees Exempt from Backup Withholding
Payees specifically exempted from backup withholding on ALL payments include
the following:
  . A corporation.
  . A financial institution.
  . An organization exempt from tax under section 501(a), or an individual
    retirement plan.
  . The United States or any agency or instrumentality thereof.
  . A State, the District of Columbia, a possession of the United States, or
    any subdivision or instrumentality thereof.
  . A foreign government, a political subdivision of a foreign government, or
    any agency or instrumentality thereof.
  . An international organization or any agency, or instrumentality thereof.
  . A registered dealer in securities or commodities registered in the U.S. or
    a possession of the U.S.
  . A real estate investment trust.
  . A common trust fund operated by a bank under section 584(a).
  . An exempt charitable remainder trust, or a non-exempt trust described in
    section 4947(a)(1).
  . An entity registered at all times under the Investment Company Act of 1940.
  . A foreign central bank of issue.

Payments of dividends and patronage dividends not generally subject to backup
withholding include the following:
  . Payments to nonresident aliens subject to withholding under section 1441.
  . Payments to partnerships not engaged in a trade or business in the U.S. and
    which have at least one nonresident partner.
  . Payments of patronage dividends where the amount received is not paid in
    money.
  . Payments made by certain foreign organizations.
  . Payments made to a nominee.

Payments of interest not generally subject to backup withholding include the
following:
  . Payments of interest on obligations issued by individuals.
    Note: You may be subject to backup withholding if this interest is $600 or
    more and is paid in the course of the payer's trade or business and you
    have not provided your correct taxpayer identification number to the payer.
  . Payments of tax-exempt interest (including exempt-interest dividends under
    section 852).
  . Payments described in section 6049(b)(5) to non-resident aliens.
  . Payments on tax-free covenant bonds under section 1451.
  . Payments made by certain foreign organizations.
  . Payments made to a nominee.

Exempt payees described above should file Form W-9 to avoid possible erroneous
backup withholding. FILE THIS FORM WITH THE PAYER, FURNISH YOUR TAXPAYER
IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE FORM, AND RETURN IT TO
THE PAYER. IF THE PAYMENTS ARE INTEREST, DIVIDENDS, OR PATRONAGE DIVIDENDS,
ALSO SIGN AND DATE THE FORM.

Certain payments other than interest, dividends, and patronage dividends, that
are not subject to information reporting are also not subject to backup
withholding. For details, see the regulations under sections 6041, 6041A(a),
6045, and 6050A. Privacy Act Notice. -- Section 6109 requires most recipients
of dividend, interest, or other payments to give taxpayer identification
numbers to payers who must report the payments to IRS. IRS uses the numbers for
identification purposes. Payers must be given the numbers whether or not
recipients are required to file tax returns. For payments made in 2002 and
2003, payers must generally withhold 30% of taxable interest, dividend, and
certain other payments to a payee who does not furnish a taxpayer
identification number to a payer. Certain penalties may also apply.

Penalties

(1) Penalty for Failure to Furnish Taxpayer Identification Number. -- If you
fail to furnish your taxpayer identification number to a payer, you are subject
to a penalty of $50 for each such failure unless your failure is due to
reasonable cause and not to willful neglect.

(2) Failure to Report Certain Dividend and Interest Payments. -- If you fail to
include any portion of an includible payment for interest, dividends, or
patronage dividends in gross income, such failure will be treated as being due
to negligence and will be subject to a penalty of 5% on any portion of an
under-payment attributable to that failure unless there is clear and convincing
evidence to the contrary.

(3) Civil Penalty for False Information With Respect to Withholding. -- If you
make a false statement with no reasonable basis which results in no imposition
of backup withholding, you are subject to a penalty of $500.

(4) Criminal Penalty for Falsifying Information. -- Falsifying certifications
or affirmations may subject you to criminal penalties including fines and/or
imprisonment.

FOR ADDITIONAL INFORMATION CONTACT YOUR TAX CONSULTANT OR THE INTERNAL REVENUE
SERVICE.